ArrynLuu

Hey everyone! I'm new to Forge and mods and such so I don't know what I've done wrong >//<. The mods I installed, Musiccraft and Optifine, works fine as well as Forge. However, I cannot for the life of me figure out why I cannot crouch/sneak! It's really annoying me because I use crouch/sneak a lot in creative mode because it allows me to control my descent rather than just dropping. Please someone help me >//<!!